综合物探方法在栖霞中桥地区溶洞塌陷地质灾害调查中的应用

Application of Comprehensive Geophysical Prospecting Method in Geological Hazard investigation of Karst Cave Collapse in Zhongqiao Area in Qixia City

摘要:

该文论述了在溶洞引发的地面塌陷地质灾害调查中，应用高密度电法、瞬变电磁法、地震频率谐振法进行综合物探勘查的效果，根据本区第四纪地层、灰岩及溶洞充填物质的物性差异，分析研究了岩溶溶洞及塌陷区的物探异常分布特征，并结合钻探验证，有效圈定了调查区岩溶溶洞及地表塌陷区的分布范围，为地质灾害调查与防治提供了科学依据。结合本次综合物探勘查效果，分析了高密度电法、瞬变电磁法及地震频率谐振法在探测溶洞及塌陷区的有效性及局限性。

Abstract:

In this paper, the effect of comprehensive geophysical exploration by using high density electric method, transient electromagnetic method and seismic frequency resonance method in the investigation of ground collapse geological hazards caused by karst caves have been discussed. According to physical property differences of Quaternary strata, limestone and karst cave filling materials in this area, the distribution characteristics of geophysical anomalies in karst caves and subsidence areas have been analyzed and studied. Combining with drilling verification, the distribution range of karst caves and surface subsidence areas in the investigated area has been effectively delineated. It will provide a scientific basis for the investigation and prevention of geological disasters. Combining with the effect of comprehensive geophysical exploration, the effectiveness and limitation of high density electric method, transient electromagnetic method and seismic frequency resonance method in detecting karst caves and subsidence areas have been analyzed.